An Orbital Angular Momentum-Based Array for in-band full-duplex communications

Yiming Zhang, Jia-Lin Li

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A uniform circular array with dual orbital angular momentum (OAM) modes is proposed for in-band full-duplex applications. The proposed scheme includes two concentric ring subarrays for transmitting and receiving, respectively, where all elements are operated under the same linear polarization. To suppress the self-interference resulting from the mutual coupling, an OAM mode-selection method related to the proposed configuration is discussed. Results indicate that good isolation performance between the transmitter and receiver can be achieved by using the proposed scheme. To validate the performance, a demonstrator with OAM modes of -1 and -2 at Ku-band is developed, fabricated, and measured. Measurements show a relative bandwidth of 21.3% from 13.5 to 16.7 GHz, referring to a 40 dB suppression level, is achieved and the desired radiations are found.

Original languageEnglish
Article number8611355
JournalIEEE Antennas and Wireless Propagation Letters
Issue number3
Pages (from-to)417-421
Number of pages5
Publication statusPublished - 2019
Externally publishedYes


  • Full-duplex
  • Mutual coupling
  • Orbitalangular momentum (OAM)
  • Self-interference suppression
  • Uniform circular array (UCA)

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